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Can someone explain why 1-3i/-2-4i simplies to 1/2 + 1/2i?
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just multiply by the complex conjugate (top and bottom) (-2+4i)/(-2+4i) and it works out :)
can you supply the details?
yeah, just multiply the top and bottom by (-2+4i) so expanding the top out you should get (1-3i)(-2+4i)= -2+4i+6i+12 On the bottom you'll get (-2-4i)(-2+4i)=4+16 You have (10+10i)/(20) which is your answer
Thanks, but why is the i not squared?
because I^2 =-1
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remember that i=sqrt(-1)
I see. Thanks.
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